Umbrella was nothing but a tool for the research of the Progenitor virus. Even without that tool, the research still survives.

Only Umbrella's lowly employees will be hurt by its dissolution. If the secret research involving the Progenitor virus is protected, then I can always rebuild anew. I've already made preparations for such a plan. The research facility in Africa remains a secret, and it is there that the Progenitor virus is produced, something that we didn't achieve until the late 80s.

Only a handful of people in the company are even aware of the African facility's existence thanks to our strict regulation of the flow of information. Only a minimum amount of personnel were ever transferred from Africa to other locations, and they were always closely monitored.